Fix bug when building Emacs with a GNU Make submake.

* Makefile.in (QUIET_SUBMAKE): New macro.
(install-info, uninstall): Use it.

Fixes: debbugs:13962

ChangeLog

@@ -1,5 +1,9 @@
 2013-03-18  Paul Eggert  <eggert@cs.ucla.edu>
 
+	Fix bug when building Emacs with a GNU Make submake (Bug#13962).
+	* Makefile.in (QUIET_SUBMAKE): New macro.
+	(install-info, uninstall): Use it.
+
 	Emacs crashes with ImageMagick 6.8.2-3 through 6.8.3-9 (Bug#13867).
 	* configure.ac (IMAGEMAGICK_MODULE): Reject 6.8.2.
 	We want to reject 6.8.2-3 through 6.8.3-9, but there seems to be

Makefile.in

@@ -67,6 +67,10 @@ CDPATH=
 # If Make doesn't predefine MAKE, set it here.
 @SET_MAKE@
 
+# Prevent submakes from outputting "Entering directory ..." and
+# "Leaving directory..." diagnostics that would mess up 'make echo-info'.
+QUIET_SUBMAKE = MAKELEVEL=0
+
 # ==================== Things `configure' Might Edit ====================
 
 cache_file = @cache_file@
@@ -609,7 +613,9 @@ install-info: info
 	   [ -f dir ] || \
 	     (cd $${thisdir}; \
 	      ${INSTALL_DATA} ${srcdir}/info/dir $(DESTDIR)${infodir}/dir) ; \
-	   info_misc=`cd $${thisdir}/doc/misc; ${MAKE} -s echo-info`; \
+	   info_misc=`cd $${thisdir}/doc/misc && \
+		$(QUIET_SUBMAKE) $(MAKE) -s echo-info \
+	   `; \
 	   cd ${srcdir}/info ; \
 	   for elt in ${INFO_NONMISC} $${info_misc}; do \
 	      test "$(HAVE_MAKEINFO)" = "no" && test ! -f $$elt && continue; \
@@ -702,7 +708,7 @@ uninstall:
 	done
 	-rm -rf $(DESTDIR)${libexecdir}/emacs/${version}
 	thisdir=`/bin/pwd`; \
-	(info_misc=`cd doc/misc; ${MAKE} -s echo-info`; \
+	(info_misc=`cd doc/misc && $(QUIET_SUBMAKE) $(MAKE) -s echo-info`; \
 	 if cd $(DESTDIR)${infodir}; then \
 	   for elt in ${INFO_NONMISC} $${info_misc}; do \
 	     (cd $${thisdir}; \